Over this/ Frustrated with TTC

I am so over this. I had no idea that TTC would be so frustrating! DH and I have been TTC for about 7 months now.  I am recently 16 days late for AF, I have been testing every other morning for the past 3 weeks all BFN or what I thought I saw in a few of them as very very faint lines.  I made a big stink at my Gynecologist office about getting a blood test done and he wouldn't do one. I called my primary doctors office and she ordered a blood test for me. I went in last night and had it drawn...then I start AF this morning after being 16 days late!!! Ahhhhh. I am not a very patient person and this is killing me, I feel like we have been trying for ever! I really need some words of encouragement right now because I'm ready to throw in the towel..